Meteoritical Bulletin: Entry for Northwest Africa 15603

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Northwest Africa 15603

Basic information

Name: Northwest Africa 15603
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15603
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 187 g

Classification
history:

Recommended:

Lunar (feldsp. breccia) [explanation]

This is 1 of 312 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 23 Feb 2023

Writeup

Writeup from MB 112:

Northwest Africa 15603 (NWA 15603)

(Northwest Africa)

Purchased: Oct 2022

Classification: Lunar meteorite (feldspathic breccia)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in October, 2022.

Physical characteristics: Dark grayish rock without fusion crust.

Petrography: The meteorite displays a fresh dark grayish interior and is a breccia composed of up to 4 mm sized mineral clasts set in a fine-grained partly shock molten matrix. Dominant minerals are anorthite, low-Ca pyroxene, augite, and olivine. Minor phases include ilmenite, troilite, and FeNi metal.

Geochemistry: olivine: Fa_26.1±0.1(Fa_26.0-26.2, FeO/MnO=79±3, n=7); low-Ca pyroxene: Fs_20.5±0.1Wo_3.4±0.3(Fs_20.4-20.6Wo_2.9-3.7, FeO/MnO=50±5, n=7); zoned pyroxene: Fs_39.1±11.8Wo_13.8±6.2(Fs_24.4-52.6Wo_6.9-25.3, FeO/MnO=52±6, n=7); calcic plagioclase: An_97.0±0.5(An_96.3-97.8, n=7)

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P Oct 2022
Mass (g):	187
Pieces:	1
Class:	Lunar (feldsp. breccia)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	26.1
Ferrosilite (mol%):	20.5; 39.1
Wollastonite (mol%):	3.4; 13.8
Classifier:	A. Greshake, MNB
Type spec mass (g):	20
Type spec location:	MNB
Main mass:	Salamu Ali
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 112, in preparation (2023)

Find references in NASA ADS:
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Photos:

Credit	Photos
Public domain photographs:
Ansgar Greshake

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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